What Does a Commercial General Contractor Do?

The short answer

A commercial general contractor (CGC) is the firm legally and financially responsible for delivering a commercial construction project on schedule, on budget, and to the design intent. The CGC plans the work, hires and manages every trade on site, owns safety and quality, and is your single point of accountability from notice-to-proceed through closeout.

If you are a developer, retailer, healthcare operator, or restaurant brand opening a new location, the commercial general contractor is the partner you sign a contract with — and the entity you call when something goes wrong.

The core scope of work

A commercial general contractor typically owns six functions on every project:

1. Preconstruction & estimating

Before a shovel hits dirt, the CGC reviews drawings, identifies constructability issues, prices the work, and develops a realistic schedule. Strong preconstruction is where 80% of cost overruns are prevented.

2. Bidding & subcontractor selection

The CGC solicits bids from qualified subcontractors (electrical, mechanical, plumbing, framing, finishes), levels the proposals apples-to-apples, and awards trade contracts. You benefit from their long-term relationships and volume pricing.

3. Permitting & jurisdictional coordination

Pulling building permits, coordinating with the AHJ (authority having jurisdiction), and scheduling inspections is the CGC''s job. In multi-state work this is where local expertise compounds: every city has its own quirks.

4. Site management & scheduling

A superintendent runs the day-to-day. They sequence trades, manage deliveries, run safety meetings, and keep the critical path moving. Behind them, a project manager handles RFIs, submittals, change orders, and owner communication.

5. Quality control & safety

The CGC owns OSHA compliance, jobsite safety plans, and the QC program that catches defects before they become punch-list items.

6. Closeout

Substantial completion, punch list, owner training, warranties, as-builts, and O&M manuals. A clean closeout is the difference between a forgettable project and a repeat client.

Commercial vs. residential general contractors

The contracts, insurance, bonding capacity, permitting environment, and trade base are all different. Commercial projects involve:

• Higher dollar values (often $500K to $50M+)
• Complex MEP systems and code requirements
• Phased occupancy and tenant coordination
• ADA, fire/life-safety, and accessibility compliance
• Performance and payment bonding
• Prevailing wage on public work

Most residential GCs cannot execute a healthcare buildout or a multi-state restaurant rollout. The skill sets, capital structure, and project controls are different categories of firm.

What a commercial general contractor is not

A CGC is not an architect or engineer — though many CGCs work in design-build or design-assist models alongside designers. A CGC is also not a construction manager (CM), though the two roles overlap. The difference: a CGC carries risk for the full contract value; a CM-at-risk does too, but a CM-as-agent only advises and you contract directly with trades.

When to hire a commercial general contractor

Bring a CGC in as early as possible — ideally during schematic design. Early involvement lets the contractor flag long-lead items, value-engineer scope, and lock in subcontractor capacity before the bid market shifts under you.

What good looks like

The best commercial general contractors deliver four things consistently:

1. Predictable budgets — guaranteed maximum price (GMP) contracts that hold
2. Realistic schedules — with the milestones that actually drive your business decisions
3. Proactive communication — weekly OAC meetings, transparent change-order logs, no surprises
4. Repeat-able rollouts — for multi-site clients, a standard playbook that delivers the same quality in every market

That is what we built Frans Construction to do — multi-state commercial design-build delivery for clients who cannot afford to relearn execution in every new city.